Fallout 3, for the very first time. The sound is incredible. The effects. Gunshots, Damage, everything. I haven't had this much fun playing through anything in a while. At the time it was released, I remember a lot of negative feedback towards VATS, but it works for me. I like it. The layering of turn based mechanics onto an action rpg, it's right in my wheelhouse.

Also, The Salt Factory. 100%. I've been working on this for almost a year. Hardest game I can think of at the moment.

That game was awesome. The mission where you are like a kid (its been a long time since playing) and its black and white is amazing.